We're dividing 628744 by 21 
We're looking to find how many times 21 goes into 628744.

Let's proceed to step 1:
21 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 21

Advancing to step 2:
62 divided by 21 is 2 with a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 20 after subtracting 42 from 62.
Bring next digit (8) of the dividend behind the 20 and repeat the process: 208 / 21

Step 3:
If we divide 208 by 21, we get 9 and a remainder of 19.
Record the quotient 9 as the next digit in the result. 
Result so far: 29.0
Deduct 189 from 208 and we're left with 19.
Append the next digit (7) from the dividend to 19 and continue with: 197 / 21

Let's proceed to step 4:
21 can be fit into 197 9 times, resulting in a remainder of 8.
Record the quotient 9 as the next digit in the result. 
Result so far: 299.0
Subtracting 189 from 197 leaves us with 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 21

Advancing to step 5:
21 goes into 84 4 times with a remainder of 0.
The next digit of our result is 4. 
Result so far: 2994.0
Subtracting 84 from 84 leaves us with 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 21

On to step 6:
If we divide 4 by 21, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 29940.0
If we subtract 0 from 4, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 7:
If we divide 40 by 21, we get 1 and a remainder of 19.
The next digit of our result is 1. 
Result so far: 29940.1
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 8:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 29940.19
Subtracting 189 from 190 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 9:
When dividing 10 by 21, we get 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 29940.19
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
21 goes into 100 4 times with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 29940.1904
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
160 divided by 21 is 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 29940.19047
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 12:
21 can be fit into 130 6 times, resulting in a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 29940.190476
Deduct 126 from 130 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 13:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 29940.1904761
Subtracting 21 from 40 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 14:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 29940.19047619
Subtract 189 from 190 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

In conclusion, the division gives 29940.19047619 with a balance of 1e-09.